Declare the rollback helpers non-movable, replace the nested conditional and C array in object_insert_rollback, silence the intentional copy in the allocator test, and avoid the missed NRVO in the test factory lambda. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01N5NasAgbDGG28MqXjQvLqp Signed-off-by: Claude <noreply@anthropic.com>